Thanks Bill,

What I recall from earlier discussions, pump flow to pressure is a
square law.  To double the flow, I would need to increase the pressure
a factor of four.  If that's the case then it seems that I would only
get about 6 * 1.4 ~= 8 1/2 GPM flow with the pumps in series.  The
radiators would be connected differently but it seems unlikely that I
would get more than 12 GPM.  I will have to try it.  It's looking like
a single WP336 (55 GPM rating) might provide better flow.

Bob W.


On Wed, 2 Mar 2005 22:44:06 -0600
"William" <wschertz@ispwest.com> wrote:

> Bob,
> Good to have some data. I have attached a crude sketch of how pumps
> (centrifugal) act when in Series or Parallel configuration. When is series,
> the pressures at any given flowrate add, when is parallel, the flows at any
> given pressure add.
>
> The added factor to be considered is the load curve that you are working
> against. Where the load curve crosses the pump curve(s) is where the flow
> will stabilize.
>
> It looks like your pumps are on the low side of pressure generation given
> the restrictions that you are asking them to pump through.
>
> Bill Schertz
> KIS Cruiser # 4045
> >

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